onsemi NCV8606MN28T2G

Overview

NCV8606MN28T2G from onsemi is an automotive-grade 2.8 V fixed-output, 500 mA low-dropout (LDO) linear regulator with enable pin, designed for space-constrained battery-powered systems. It delivers ±2% output voltage tolerance over −40°C to 125°C, features 170 mV typical dropout at 500 mA, 62 dB PSRR at 120 Hz, and operates from 1.5 V to 6.0 V input. Used in notebook computers and portable instrumentation where low noise and thermal robustness are critical.

For engineers reviewing the NCV8606MN28T2G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed automotive-grade specifications (AEC−Q100 qualified), real-world application constraints, and two rigorously validated alternative parts - all derived exclusively from onsemi's official NCV8605/NCV8606 datasheet Rev. 4 (July 2024).

Technical Context

The NCV8606MN28T2G integrates a PMOS pass transistor with internal current limiting (675 mA), thermal shutdown (175°C trip), and an active-high enable input. Its architecture supports stable operation with low-ESR ceramic capacitors as small as 1 µF on both input and output.

Unlike the NCV8605 variant, the NCV8606MN28T2G includes dedicated EN and SENSE/ADJ pins - enabling precise power sequencing and output voltage monitoring. Ground current remains constant at 145–180 µA across load (1–500 mA), independent of output loading.

Key Specifications

Pinout & Package

NCV8606MN28T2G is housed in a thermally enhanced DFN6 3.0×3.3 mm package (Case 506AX) with exposed pad tied to GND for improved heat dissipation. Pin 1 and Pin 6 are both Vin inputs and must be externally shorted for full 500 mA capability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with NCV8606MN28T2G, NCV8606MN25T2G offers identical automotive qualification and performance at 2.5 V, while TLV73328PDBVR trades current capability, PSRR, and qualification for smaller footprint and lower cost - making it viable only outside automotive or high-reliability contexts.

Availability

NCV8606MN28T2G is available at Aetrix Electronics and suitable for automotive body electronics, portable instrumentation, industrial sensor nodes, and notebook computer power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NCV8606MN28T2G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV8606MN28T2G belongs to onsemi's automotive-qualified LDO family, engineered specifically for safety-critical and thermally demanding environments where AEC−Q100 compliance, low noise, and robust protection features are mandatory.

FAQ

What is the maximum input voltage rating for the NCV8606MN28T2G?

The NCV8606MN28T2G has an absolute maximum input voltage rating of 6.5 V. However, its recommended operating input voltage range is 1.5 V to 6.0 V. Exceeding 6.5 V risks permanent damage, and operation below 1.5 V or below (Vout + VDO) - i.e., below ~2.99 V for 2.8 V output at 500 mA - will cause dropout and loss of regulation. The NCV8606MN28T2G must be operated within these boundaries to ensure reliable function and longevity.

Does the NCV8606MN28T2G require external resistors for output voltage setting?

No, the NCV8606MN28T2G is a fixed-output 2.8 V regulator and does not require external resistors. Its SENSE/ADJ pin is internally configured for fixed-voltage operation and must be connected directly to the output capacitor (as shown in Figure 2 of the datasheet). External resistor dividers are only used with adjustable variants like NCV8606MNADJT2G - the NCV8606MN28T2G achieves its 2.8 V output via internal trimming and requires no external feedback components.

What is the thermal resistance (R_JA) of the NCV8606MN28T2G in standard layout?

The NCV8606MN28T2G has a specified thermal resistance of 75°C/W (junction-to-ambient) when soldered on a 645 mm², 1 oz copper FR4 PCB. This value assumes optimal thermal land pattern including connection of the exposed pad to a solid ground plane. Deviations - such as reduced copper area, thinner copper, or lack of thermal vias - will increase R_JA and reduce safe power dissipation. For example, at 25°C ambient, the NCV8606MN28T2G can dissipate up to 1.3 W before reaching its 125°C recommended max junction temperature.

How does the enable pin (EN) behave during power-up of the NCV8606MN28T2G?

The EN pin of the NCV8606MN28T2G is active-high with a threshold of 0.9 V (min) for logic high and 0.4 V (max) for logic low. During power-up, the regulator remains disabled until EN exceeds 0.9 V; once asserted, typical enable time to 90% of 2.8 V output is 18 µs (for 2.8 V output). If EN is left floating, the part may power up unpredictably - onsemi recommends tying EN to VIN if unused. The NCV8606MN28T2G's EN pin draws negligible current, supporting direct GPIO control without level-shifting.

Is the NCV8606MN28T2G compatible with ceramic output capacitors smaller than 10 µF?

Yes, the NCV8606MN28T2G is stable with ceramic output capacitors as small as 1.0 µF and does not require minimum ESR. The datasheet confirms stability with Murata GRM219R71E105K (1 µF, 25 V, X7R) and validates performance down to this value. Using <1 µF may degrade load transient response and PSRR, but 1 µF is the verified minimum for guaranteed stability across temperature and load. Larger values (e.g., 10 µF) improve noise rejection and transient behavior - the NCV8606MN28T2G imposes no upper capacitance limit.